Yarn take-up and tension for knitting-machines.



R. W. SCOTT.

YARN TAKE-UP AND TENSIQN FOR KNITHNG'MAGHINES.

APPLICATION FILED AUG.3. 1915.

1, 523355 a Patented Aug. 28, 191.?

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' Specification of "Letters Patent.

Patented A mg. 28, 191?.

Wm! aopiicatiou tiled February 3, 1913, Serial No. 746,070. Divided and this application filed August 3, 1915. Serial No.43,407.

raid! whom it may concern:

; Be it known that 1, Roman W. Score, a

citizen of the United States, and resident of sionfor Knitting-Machines, of which the following is a specification.

My invention relates to an overhead yarn guide or support and yarn take-up; device or use in knitting machines, especially in knitting machine's-adapted for reciprocatory "a hosiery or other knitting machine, and other objects are to secure by slmple andw I disclosed .a

knitting.

One object of my invention is to secure byimproved automatic means the automatic recovery of the slack formedduring reciproc'atory movements of the driven'member of adjustable means the independent recovery of two or more yarns fed together during the reciprocal movements of the driven part )f such a machine.

In the accompanying drawings, Figure 1 is a left side elevation; .Fig. 2 is a plan; and v (Fig. 3 's a view similar to Fig. 1, illus- -trating the parts in a different position.

. In my application, Serial No. 746,070, filed February 3, 1913, (Letters Patent No. 1,152,850, dated September 7, 1915,) of which this a plication is a divisioml have l iosiery knitting machine com- 4 rising a bed-plateC having a boss 0 in a bore in which is erected a standard E upon which, at a suitable'hcight above the knitting. head, is mounted the take-up and ten 'sion-carrying member E Theusual overhead yarn-guide and the usual'bobbimstand may also be supported by the standard E;

Referring to Figs. 1 and 2, the member E may be a castingof the T-shaped form shown 1 bent back toward the hack of the machine as having stiffening webs 625 and a central aperture 626 to receive and guide the upper end of a thrust-bar 460, which bar maybe 'shown in Fig. 1. The lower end of said bar 'is guided in comb 451, the lower end of said bar-resting on the face of a pattern drum 120 carrying cams 508 to encounter and lift the bar 460 at the proper times, for instance,

whenever the machine is reciprocating.

The member E is provided with short transverse webs 626, 663 bored to receive yarn movable tension. disk-636 to guiding eyes (1. Beyond the web 628 and at one end of the member 15%, the web 625 supports lugs 627 having vertical bores for eyelets a. Lugs 627 are separated from the web 628 by frcespace adapted to recelve hook ends 630 of wire tension arms 631 adjustably fastened to rocker arms 632 journaled at 633 on the lowdr extension 626 of the web 625. Each rocker arm 632 carries a lug 634 standmg beneath a vertlcal bore formed 1n a part or lug 629, integral with the member E the parts 631, 632 and 634 constituting a yarn take-up lever. Like tension springs 641 held at one end by separately adjustable wire arms 642 screwed on the under face of member E determine the elevating tensions of the take-up levers. Each of the lugs 629 has fixed therein by means of a set screw 640 a fixed member 639 of ayarn tension device also comprising a vertically movable member 636, having; an extension 655 received and freely movable in a central bore of the mem her 639. The extension 635 rests on the lug 634.:

The position of the eyes a in the flanges 628 and 638 is such as to guide the yarn or yarns on each side of the central web 625 across the upper face of the fixed member 639 of the gravity tension device comprised by the upper face of the member 639 and the movable member 636. In practice, for variations in the yarn tcnsion,- tension disks 636 of different weights or weights for addition to the members636 are employed to vary the yarn tension when desired.

In two separated bores of the upper end ofbar 460, adiusting screws 643 hold against the face of said bar by means of the grooved washers 644. bent wire tappet arms 645 which may be separately adjusted by sliding them in the grooves in the washers, or rototing them with respect to the screws, and

locked inadjustment by setting up the screws 643. Said arms havebept upper ends 646 taking over the'rocker 632 to hold the wire arms 631 down against the tension. of spring 641, except when a cam'508 lifts the bar 460. 4 The opsration will now be apparent. Whenever the bar 460 is lifted, each of the take-up levers is. released, movement of the lug 634 at the same time permitting the place the yarn under tension. The components of a yarn 46 I i glurality of component yarns fed together to be fed as a single yarn during reciprocation inay be separatelytensi-oned and sepa rately recovered by the use of my device.

It will be Observed that the tension between the disks 639, 636 is delicately and separately adjustable for each pair of disks, both by varying the Weight of the movable memtion, moves in unison with the pattern indications controlling the times of operation of the machine and the operation of the yarn carriers, andfin normal use the cams 508 operate to release the take-up levers 631, 632 during recip'rocatory knitting, passage of the cams 508 from under the bar 460 acting to release the bar 460 to hold down the levers 631. 632 during rotary knitting.

What I claim is:

1. A knitting machine having in combination a yarn take-up lever, and means for guiding and tensionin sisting of an adjustab e fixed tension disk, and a movable tension disk having an extension adapted to contact with saidlever inone position of said lever, whereby then to separate said fixed and movable disks, a patt'e'rn surface, -'and a direct connection between said pattern surface and said'lever idapted to hold said leverin said position at predetermined times.

2. A knitting machine having in combination a pattern surface, a thrust-bar coijperating with said pattern surface, a yarn take-up lever, and means for guiding and tensioning a run of yarn consisting of a movable tension disk controlled by said lever, an adjustable fixed tension disk, and ad ustable means carried by said bar for positioning said lever according to the indications onsaid pattern surface.

3; A knitting machine adapted to knit a tiring recipro'catory knitting having therein in combination a similar plurality of fake-up levers, one for each of the respective component yarns, separately adjustable sprin s for saidtake-up levers, separate tension evices for the respective yarns independently controlled by the take-up levers,

a run of yarn connear the guided run of the yarn, a gravity tension disk to rest upon-said fixed disk,' 9. spring actuated, take-up lever engaging the yarn at another guided run thereof, an arm oil said lever to engage and lift said movable disk, and an adjustable tappet member on said thrust-bar, to engage and lock down the takeup arm and open the tension disks at times determined by the pattern.

5. In a knitting machine, means for rot'ary and recipi'ocatory knitting, 'a pattern mechanism, and a vertically movable bar cooperating with said pattern mechanism for actuation at the beginning and the end of reljciprocatory movement of the machine, in combination with means to guide the knitting y'arn, a fixed tension disk near the guided rim of the yarn, a gravity tension disk to rest upon said fixed disk, .a take-up lever engaging the yarn at another guidedruii thereof a pivot for said take-up lever, an arm on said l'ever to engage and lift said movable disk, and an adjustable tappet member on said vertical bar, to engage and lock down the take-up arm and openthe tension disks during rotary knitting.

6. A knitting machine having in combination a pattern surface, a thrust-baic'o Spcrating with said pattern surface, a pinralit'y of take-up levers, separately-adjustable springs therefor, and means for guiding and tensioning a plurality of runs of yarn comprising movable tension disks separat'ely controlled-by said levers, adjustable fixed tension disks cooperating with said fixed disks, and separately adjustable means carried by said her for positioning said levers according to the indications on said pattern surface.

Signed by me at Boston, Massachusetts, this thirtieth day of July, 1915.

ROBERT W. scoTT. 

